ATOMIC NUMBER & MASS NUMBER

 

Name of Element

Symbol

Atomic #

# of protons

# of electrons

1.

OXYGEN

 

 

 

 

2.

 

Ca

 

 

 

3.

 

 

53

 

 

4.

 

 

 

11

 

5.

 

 

 

 

47

6.

 

 

 

 

16

7.

 

 

 

80

 

8.

 

 

26

 

 

9.

 

Si

 

 

 

10.

MAGNESIUM

 

 

 

 

Complete the following chart.  Remember:  mass number = # of protons + # of neutrons

 

Name of Element

Symbol

Atomic #

Mass #

# of protons

# of neutrons

# of electrons

11.

NEON

 

 

20

 

 

 

12.

 

Co

 

 

 

32

 

13.

 

 

79

197

 

 

 

14.

 

 

 

 

17

18

 

15.

 

 

 

 

 

142

90

16.

 

 

 

207

 

125

 

17.

 

 

28

59

 

 

 

18.

 

 

14

 

 

14

 

19.

POTASSIUM

 

 

 

 

20

 

20.

 

 

 

 

74

110

 

 

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